The heart of the design--chosen for durability, quality, and value-- is the die-cast aluminum seat structure or "chassis," which holds the chair together, unifying the independent and interchangeable elements of the seat, backrest, arms, and base. Because the Arc Chair's seat, backrest, and arms all attach independently to the die-cast aluminum chassis, they may be specified in a broad spectrum of interchangeable materials and finishes from Harter's extensive materials palette. This maximizes design creativity, functionality, and ease of maintenance. Four leg, cantilever, stool height and swivel bases support wood, thermo and upholstered seats and backs. Design: Jonas Damon